#include "catch.hpp"

#include <mapnik/geometry/polylabel.hpp>

TEST_CASE("polylabel") {

SECTION("empty polygon") {

    mapnik::geometry::polygon<double> poly;
    mapnik::geometry::point<double> pt;

    CHECK(!mapnik::geometry::polylabel(poly, 1.0, pt));
}

SECTION("empty exterior ring") {

    mapnik::geometry::polygon<double> poly;
    poly.emplace_back();

    mapnik::geometry::point<double> pt;

    CHECK(!mapnik::geometry::polylabel(poly, 1.0, pt));
}

SECTION("polylabel with a square") {

    mapnik::geometry::polygon<double> poly;
    poly.emplace_back();
    auto & exterior_ring = poly.front();
    exterior_ring.emplace_back(-1, -1);
    exterior_ring.emplace_back( 1, -1);
    exterior_ring.emplace_back( 1,  1);
    exterior_ring.emplace_back(-1,  1);
    exterior_ring.emplace_back(-1, -1);

    mapnik::geometry::point<double> pt{ -3, -3 };

    CHECK(mapnik::geometry::polylabel(poly, 1.0, pt));
    CHECK(pt.x == Approx(0));
    CHECK(pt.y == Approx(0));
}

}
